perf(nextjs-mf): derive federated stats from manifest

[ScriptedAlchemy]

Description

Use mf-manifest.json as the primary source of expose assets for Next.js flushChunks, avoiding the second full Webpack stats traversal that made federated-stats.json expensive on large builds.

Rolling upgrades remain bidirectionally compatible: new hosts fall back to federated-stats.json for old or partially analyzed remotes, while new remotes still emit both historical stats filenames with the expose fields consumed by old hosts. Custom manifest filenames, browser and SSR public paths, nested/scoped aliases, CSS assets, and missing exposes are covered.

Because this resolves #4706 under the default configuration, the unreleased skipFederatedStats option and changeset from #4732 are removed instead of retaining a public performance flag. manifest: false and disableAssetsAnalyze still select complete legacy stats generation for configurations that do not provide analyzed manifest assets.

The local Next fixture removed the measured 286.60 ms stats.toJson correlation call while still emitting both compatibility assets. Final production E2E completed 19/19 tasks and 28 browser tests with no failures. Focused suites passed 52 node tests, 26 nextjs-mf tests, and 69 SDK tests with one existing skip; affected builds passed 18/18 tasks. The repo-wide Prettier gate remains blocked only by pre-existing generated packages/playground/src/generated/bridgeRuntimeFiles.ts; all changed files pass formatting.

Related Issue

Closes #4706. Supersedes the unreleased performance opt-out from #4732.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the documentation.

[changeset-bot]

🦋 Changeset detected

Latest commit: 9b9d9ac

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 47 packages

Name	Type
@module-federation/nextjs-mf	Patch
@module-federation/node	Patch
@module-federation/sdk	Patch
@module-federation/modern-js-v3	Patch
@module-federation/modern-js	Patch
@module-federation/rsbuild-plugin	Patch
node-dynamic-remote-new-version	Patch
node-dynamic-remote	Patch
@module-federation/devtools	Patch
@module-federation/cli	Patch
@module-federation/dts-plugin	Patch
@module-federation/enhanced	Patch
@module-federation/esbuild	Patch
@module-federation/managers	Patch
@module-federation/manifest	Patch
@module-federation/metro	Patch
@module-federation/observability-plugin	Patch
@module-federation/retry-plugin	Patch
@module-federation/rspack	Patch
@module-federation/rspress-plugin	Patch
@module-federation/runtime-core	Patch
@module-federation/runtime	Patch
@module-federation/storybook-addon	Patch
@module-federation/utilities	Patch
@module-federation/webpack-bundler-runtime	Patch
@module-federation/bridge-react-webpack-plugin	Patch
@module-federation/bridge-react	Patch
@module-federation/bridge-vue3	Patch
shared-tree-shaking-with-server-host	Patch
shared-tree-shaking-with-server-provider	Patch
@module-federation/playground	Patch
remote5	Patch
remote6	Patch
shared-tree-shaking-no-server-host	Patch
shared-tree-shaking-no-server-provider	Patch
@module-federation/metro-plugin-rnc-cli	Patch
@module-federation/metro-plugin-rnef	Patch
@module-federation/metro-plugin-rock	Patch
website-new	Patch
@module-federation/runtime-tools	Patch
@module-federation/inject-external-runtime-core-plugin	Patch
@module-federation/third-party-dts-extractor	Patch
@module-federation/bridge-shared	Patch
@module-federation/error-codes	Patch
create-module-federation	Patch
@module-federation/treeshake-server	Patch
@module-federation/treeshake-frontend	Patch

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commit: 9b9d9ac

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🚀 Preview Environment Ready!

Name	Status	URL
website-new	✅ Active	https://nestor-lopez-30019-website-new-core-module-federa-ce08b3f... ↗

Details:

• Latest Commit: 9b9d9ac
• Updated at: 7/17/2026, 11:22:22 PM

[github-actions]

Bundle Size Report

12 package(s) changed, 30 unchanged.

Package dist + ESM entry

Package	Total dist (raw)	Delta	ESM gzip	Delta
@module-federation/bridge-vue3	179.6 kB	+19 B (+0.0%)	26.0 kB	+7 B (+0.0%)
@module-federation/nextjs-mf	163.3 kB	+7.1 kB (+4.5%)	160 B	no change
@module-federation/node	198.0 kB	+4.8 kB (+2.5%)	217 B	no change
@module-federation/playground	28.83 MB	-714 B (-0.0%)	43.6 kB	no change
@module-federation/runtime-tools	7.7 kB	-65 B (-0.8%)	142 B	no change
@module-federation/sdk	128.9 kB	+183 B (+0.1%)	785 B	no change
@module-federation/utilities	107.6 kB	-34 B (-0.0%)	227 B	no change

Bundle targets

Package	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta
@module-federation/bridge-vue3	19.2 kB	-1 B (-0.0%)	19.5 kB	-1 B (-0.0%)
@module-federation/cli	2.3 kB	-3 B (-0.1%)	2.4 kB	-32 B (-1.3%)
@module-federation/core	1.0 kB	-3 B (-0.3%)	1.0 kB	-34 B (-3.1%)
@module-federation/devtools	30.3 kB	-4 B (-0.0%)	30.3 kB	-27 B (-0.1%)
@module-federation/enhanced	2.7 kB	+2 B (+0.1%)	2.8 kB	-44 B (-1.5%)
@module-federation/metro-plugin-rnc-cli	416 B	no change	435 B	-26 B (-5.6%)
@module-federation/nextjs-mf	5.1 kB	+396 B (+8.1%)	5.1 kB	+396 B (+8.1%)
@module-federation/node	9.2 kB	no change	9.2 kB	-28 B (-0.3%)
@module-federation/sdk	4.4 kB	+3 B (+0.1%)	5.9 kB	+2 B (+0.0%)

Consumer scenarios

Scenario	Web output (gzip)	Delta	Node output (gzip)	Delta	Gap (node-web)	Delta
Enhanced remoteEntry	21.4 kB	-16 B (-0.1%)	23.1 kB	-13 B (-0.1%)	+1.7 kB	+3 B

Total dist (raw): 35.79 MB (+11.3 kB (+0.0%))
Total ESM gzip: 104.9 kB (+7 B (+0.0%))
Total web bundle (gzip): 233.5 kB (+390 B (+0.2%))
Total node bundle (gzip): 236.1 kB (+206 B (+0.1%))
Tracked ./bundler entry gzip: 556 B (no change)
Tracked ./bundler web bundle (gzip): 4.8 kB (no change)
Tracked ./bundler node bundle (gzip): 4.8 kB (no change)

Bundle sizes are generated with rslib (Rspack). Package-root metrics preserve the historical report. Tracked subpath exports such as ./bundler are measured separately so ENV_TARGET-driven tree-shaking is visible. Bare imports are externalized to keep package-level sizes consistent, and assets are emitted as resources.